lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <4707CCF1.8080909@pobox.com> Date: Sat, 06 Oct 2007 13:59:13 -0400 From: Jeff Garzik <jgarzik@...ox.com> To: Yinghai Lu <yhlu.kernel@...il.com> CC: Ayaz Abdulla <aabdulla@...dia.com>, Manfred Spraul <manfred@...orfullife.com>, nedev <netdev@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, David Miller <davem@...emloft.net>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: MSI interrupts and disable_irq Yinghai Lu wrote: > On 9/28/07, Jeff Garzik <jgarzik@...ox.com> wrote: >> Ayaz Abdulla wrote: >>> I am trying to track down a forcedeth driver issue described by bug 9047 >>> in bugzilla (2.6.23-rc7-git1 forcedeth w/ MCP55 oops under heavy load). >>> I added a patch to synchronize the timer handlers so that one handler >>> doesn't accidently enable the IRQ while another timer handler is running >>> (see attachment 'Add timer lock' in bug report) and for other processing >>> protection. >>> >>> However, the system still had an Oops. So I added a lock around the >>> nv_rx_process_optimized() and the Oops has not happened (see attachment >>> 'New patch for locking' in bug report). This would imply a >>> synchronization issue. However, the only callers of that function are >>> the IRQ handler and the timer handlers (in non-NAPI case). The timer >>> handlers use disable_irq so that the IRQ handler does not contend with >>> them. It looks as if disable_irq is not working properly. >>> >>> This issue repros only with MSI interrupt and not legacy INTx >>> interrupts. Any ideas? >> (added linux-kernel to CC, since I think it's more of a general kernel >> issue) >> > I wonder if the race is between soft_timer for nv_do_nic_poll from > different CPUs Interested parties should try the forcedeth patches I just posted :) Jeff - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists